> I think it's quite likely that both sexual orientation and jaw size are influenced by the same hormones (e.g. testosterone), since both features are involved

> I think it's quite likely that both sexual orientation and jaw size are influenced by the same hormones (e.g. testosterone), since both features are involved in sexual dimorphism "Gay bears" would disagree with you: https://www.google.de/search?q=gay+bears https://www.google.de/search?q=gay+bears